noun, noun which may take the genitive case particle 'no'
A class; first class; top grade
Used for ranking, grading, or categorizing something as the highest or best tier. Often appears in contexts like sports leagues, product grades, or academic levels.
彼はAクラスの選手だ。
He is an A-class player.
このホテルはAクラスのサービスを提供している。
This hotel provides first-class service.